RF5924_1 datasheet(9/14 Pages) RFMD

9 / 14 page

9 of 14

RF5924

Rev A6 DS061018

7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical

support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.

RF5924 Biasing Instructions:

•

802.11b/g Transmit (VCC compliance=5V, 500mA, VREG compliance=3V, 20mA)

• Connect the FEM to a signal generator at the input and a spectrum analyzer at the output.

•Bias VCC to 3.7V first with PA_EN=0.0V

• Refer to switch operational truth table to set the control lines at the proper levels for WLAN TX.

• Turn on PA_EN to 2.7V. PA_EN controls the current drawn by the 802.11b/g power amplifier and the current

should quickly rise to ~180mA±30mA for a typical part but it varies based on the output power desired. Be

extremely careful not to exceed 3.0V on the PA_EN pin or the part may exceed device current limits.

•

802.11 b/g Receive

• To Receive WLAN set the switch control lines per the truth table below.

•

Bluetooth Receive

• To Receive Bluetooth set the switch control lines per the truth table below.

Operational Truth Table

Mode

TRSW-P

TRSW-M

ANSW-P

ANSW-M

PA_EN

Bluetooth

HLHL

WLAN TX

WLAN RX

Indeterminate

All other states

*Note: The state of the ANSW-P is a don’t care. It can be either High or Low, and will yield the same performance.

RF5924 Datasheet(PDF) 9 Page - RF Micro Devices